Question

What is the charge of 96 amu of $ {S^{2 - }} $ ?
(A) 2C
(B) $ 3.2 \times {10^{ - 19}}C $
(C) $ 9.6 \times {10^{ - 19}}C $
(D) 6 C

Answer 1

Hint :Sulfur is a chemical element with the atomic number 16 and the symbol S. It's nonmetallic, plentiful, and multivalent. Sulfur atoms form cyclic octatomic molecules with the chemical formula $ {S_8} $ under normal circumstances. At ambient temperature, element sulphur is a brilliant yellow crystalline solid. Sulfur is the tenth most abundant element in the universe in terms of mass, and the fifth most abundant on Earth. Sulfur on Earth is mostly found in sulphide and sulphate minerals, however it is occasionally discovered in its pure, natural form.

Complete Step By Step Answer:
Sulfide is a sulphur inorganic anion with the chemical formula $ {S^{2 - }} $ , as well as a compound having one or more $ {S^{2 - }} $ ions. Sulfide salt solutions are corrosive. Large families of inorganic and organic substances, such as lead sulphide and dimethyl sulphide, are classified as sulphides. The conjugate acids of sulphide are hydrogen sulphide and bisulfide.
Sulfide ions have an atomic mass of 32 amu.
When there is a mass of 96 amu the number of sulphide ions is 3 ions,
The number of sulphide ions is equal to three.
Charge on 1 sulfide ion =−2
The charge on 3 sulfide ions =3 x (−2)=−6
The charge of 96 amu sulfide ions is (-6) i.e. charge on 6 electrons.
 $ \Rightarrow $ Charge on 6 electrons = $ 6 \times 1.6 \times {10^{ - 19}}C $
 $ \Rightarrow C = 9.6 \times {10^{ - 19}}C $
Hence option C is correct.

Note :
Solid sulphides are formed when aqueous solutions of transition metal cations react with sulphide sources. Many of these inorganic sulphides are connected to minerals with similar compositions and have a limited solubility in water (see below). The brilliant yellow species CdS, sometimes known as "cadmium yellow," is a well-known example. $ A{g_2}S $ is the black tarnish that forms on sterling silver. Salts are a term used to describe such creatures. In reality, transition metal sulphides have strong covalent bonding, which gives them semiconductor characteristics, which are linked to their deep hues. Several of them have practical uses as pigments, solar cells, and catalysts.